public void WritePpuMemory(int address, byte data)
{
if (address < 0x3F00)
{
_cart.WriteCart(address, data);
}
else
{
if ((address & 0x10) != 0 && (address & 3) == 0)
{
address &= ~0x10;
}
paletteRam[address & 0x1F] = (byte)(data & 0x3F);
}
}
public void WriteMemory(int address, byte data)
{
address &= 0xFFFF;
if (address < 0x2000)
{
ram[address & 0x7FF] = data;
}
else if (address < 0x4000)
{
_ppu.WritePpuRegister(address, data);
}
else if (address < 0x4020)
{
//$4000-$4017 $0018 NES APU and I/O registers
//$4018-$401F $0008 APU and I/O functionality that is normally disabled.See CPU Test Mode.
if (address == 0x4014)
{
_cpu.CycleCountStep += 514; //oam transfer stall cpu for 514 cycles
_cpu.SetCycleCount(_cpu.GetCycleCount() + 514);
_ppu.WritePpuRegister(address, data);
}
else if (address == 0x4016)
{
strobingPad = ((data & 1) != 0) ? true : false;
padShiftCounter = 0;
}
else
{
_apu.WriteApuRegister(address, data);
}
}
else
{
//$4020-$FFFF $BFE0 Cartridge space: PRG ROM, PRG RAM, and mapper registers (See Note)
_cart.WriteCart(address, data);
}
}